SATK22
15
DHW Function
The DHW cycle always takes priority over the heating cycle.
DEFAULT SETTING: fixed DHW set point (parameter t06=0)
When DHW cycle activation is requested, due to DHW tapping
by the user (detected by the domestic water flow meter), the
regulator modulates the valve opening in order to adjust the
temperature detected by the domestic water probe to the
selected set point value. When tapping ends, the modulating
valve is fully closed.
The DHW cycle ON condition is indicated by the blinking
symbol.
OPTIONAL SETTING: primary return temperature limit
(technical parameter t06 = 1)
When DHW cycle activation is requested, due to DHW tapping
by the user (detected by the domestic water flow meter), the
regulator modulates the valve opening in order to adjust the
temperature detected by the domestic water probe to the
DHW set point value if the return temperature is less than or
equal to the set limit. If this condition is not met, the flow
temperature is reduced (by a maximum of 7°C down to a
temperature that can be no less than 40°C), in order to bring
return temperature within the limit values
.
Due to the activation of the return temperature limitation
function, the DHW temperature can be lower than the set
value.
DHW/primary return limit temperature setting
To set the DHW temperature press the <SET> key until the
symbol in the red circle appears; for the return temperature
limit press the key until the symbols in the green circle are
displayed. Use the <R> knob to change the value (*).
The range of possible DHW temperatures is 42–60°C, while the
range of possible return temperatures is 15–45°C.
(*)
if these set points cannot be changed you must set parameter t07 to value 0 in the technical menu (see “access to technical
menu” below). Parameter t07 = 1 “freezes” the operating set points to prevent inadvertent modifications by the user.
